Male Calcaneofibular Ligament

Description

Running from the anterior margin of the lateral malleolus (distal fibula) to the lateral surface of the calcaneus, the calcaneofibular ligament (CFL) is highlighted as a cordlike lateral stabilizer spanning the subtalar region. Deep to the fibularis (peroneal) tendons and lateral to the talus, it courses inferiorly and slightly posteriorly, crossing both the talocrural and subtalar joints. Adjacent lateral collateral components are typically visible in this setup, including the anterior talofibular ligament anteriorly and the posterior talofibular ligament posteriorly, with the joint capsule and lateral tarsal contours providing bony landmarks. Clinically, the CFL matters because it is the main restraint to hindfoot inversion when the ankle is in neutral or dorsiflexion, and it is commonly injured in grade II to III lateral ankle sprains after failure of the anterior talofibular ligament. Stress testing maps directly to its fiber direction: a positive talar tilt test suggests CFL involvement and helps distinguish isolated talocrural laxity from combined talocrural and subtalar instability. For operative planning, this ligament defines the lateral gutter anatomy encountered during Brostrom-type repair or lateral ligament reconstruction, and its relationship to the fibularis tendons and peroneal retinacula helps explain associated tendon subluxation symptoms. A small structure. Big implications. Use this plate in gross anatomy or musculoskeletal medicine teaching to anchor lateral ankle ligament anatomy to palpation landmarks, or in sports medicine and orthopaedic publications discussing sprain grading, stress exam interpretation, and reconstruction technique. It also fits radiology education on why MRI often shows edema along the distal fibula and lateral calcaneal wall when the CFL is torn. Anatomical accuracy verified by SciePro's Medical Advisory Board.